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Puzzles (3 cohencoins award for each match):

Puzzle nt5Sa: 999999999

IM Holden2 (1657) +5
FEN
[Event " MrCohenOS Arena"] [Site "https://cohenchessclub.com/7d0QUMri"] [Date "2026.04.20"] [White "Holden2"] [Black "Sadie"] [Result "1-0"] [UTCDate "2026.04.20"] [UTCTime "23:21:59"] [WhiteElo "1657"] [BlackElo "1297"] [WhiteRatingDiff "+5"] [BlackRatingDiff "-4"] [WhiteTitle "IM"] [BlackTitle "GM"] [Variant "Standard"] [TimeControl "420+2"] [ECO "C41"] [Opening "Philidor Defense"] [Termination "Normal"] [Annotator "cohenchessclub.com"] 1. e4 e5 2. Nf3 d6 3. Bc4 { C41 Philidor Defense } Bg4 4. Nc3 Nc6 5. d4?? { (1.04 → -0.86) Blunder. h3 was best. } (5. h3) 5... exd4?! { (-0.86 → -0.17) Inaccuracy. Nxd4 was best. } (5... Nxd4 6. Qd3) 6. Nd5 Nf6 7. O-O Nxe4?? { (-0.32 → 4.83) Blunder. Be7 was best. } (7... Be7 8. Be2) 8. Re1 Bxf3? { (4.72 → 8.85) Mistake. f5 was best. } (8... f5 9. h3 Bh5 10. g4 Qd7 11. gxh5 O-O-O 12. Nf4 Re8 13. Nxd4 Nxd4 14. Qxd4 c6 15. Qxa7) 9. Qxf3 Ne5 10. Qxe4 c5 11. f4 Qa5 12. fxe5 O-O-O 13. exd6 f5 14. Qxf5+ Kb8 15. Ne7? { (12.92 → 4.48) Mistake. Re7 was best. } (15. Re7) 15... Qxe1+ 16. Bf1 Rxd6?? { (6.29 → Mate in 1) Checkmate is now unavoidable. Ka8 was best. } (16... Ka8 17. Qxc5 Bxe7 18. dxe7 Rd7 19. b3 Rxe7 20. Bf4 Qxa1 21. Qxe7 a6 22. Qxg7 Re8 23. h3) 17. Qc8# { White wins by checkmate. } 1-0
Computer analysisMove timesCrosstableFEN & PGN
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